Kohaku: D-chan, he's your fan Dtto: No, I think he's your fan Kohaku: (wait, we're supposed to fight) He's my fan! Dtto: No, he's mine! I love how their first reaction (their real thought) was to think that fan is not her own fan. But after a moment, they realized that they're supposed to fight each other, so they started to bragging out that the fan is her fan.